In the circuit shown in the figure, the effective resistance between \(A\) and \(B\) is:

                             

1. \(2~\Omega\)
2. \(4~\Omega\)
3. \(6~\Omega\)
4. \(8~\Omega\)

Subtopic:  Combination of Resistors |
 79%
From NCERT
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The current through the \(5~\Omega\) resistor is:

     

1. \(3.2\) A                     

2. \(2.8\) A

3. \(0.8\) A                     

4. \(0.2\) A

Subtopic:  Kirchoff's Voltage Law |
 68%
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In the circuit shown, the value of each of the resistances is \(r\). The equivalent resistance of the circuit between terminals \(A\) and \(B\) will be:
          
1. \(\frac{4r}{3}\)
2. \(\frac{3r}{2}\)
3. \(\frac{r}{3}\)
4. \(\frac{8r}{7}\)

Subtopic:  Combination of Resistors |
 70%
From NCERT
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Drift velocity \(v_d\) varies with the intensity of electric field as per the relation:
1. \(v_{d} \propto E\)
2. \(v_{d} \propto \frac{1}{E}\)
3. \(v_{d}= \text{constant}\)
4. \(v_{d} \propto E^2\)

Subtopic:  Current & Current Density |
 78%
From NCERT
PMT - 1981
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What is the equivalent resistance of the circuit​​​​​?

           

1. \(6~\Omega\)
2. \(7~\Omega\)
3. \(8~\Omega\)
4. \(9~\Omega\)

Subtopic:  Combination of Resistors |
 70%
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Equivalent resistance across terminals \(A\) and \(B\) will be:

          
1. \(1~\Omega\)
2. \(2~\Omega\)
3. \(3~\Omega\)
4. \(4~\Omega\)

Subtopic:  Combination of Resistors |
 71%
From NCERT
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The total current supplied to the circuit by the battery is:

         

1. \(1~\text{A}\)
2. \(2~\text{A}\)
3. \(4~\text{A}\)
4. \(6~\text{A}\)

Subtopic:  Combination of Resistors |
 65%
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A battery of emf \(E\) and internal resistance \(r\) is connected to a variable resistor \(R\) as shown below. Which one of the following is true​​​​​​?

           

1. Potential difference across the terminals of the battery is maximum when \(R=r\).
2. Power delivered to the resistor is maximum when \(R=r\).
3. Current in the circuit is maximum when \(R=r\).
4. Current in the circuit is maximum when \(R>>r\).
Subtopic:  EMF & Terminal Voltage |
 64%
From NCERT
PMT - 1995
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The current in the arm \(CD\) of the circuit will be:
             
1. i1+i2

2. i2+i3

3. i1+i3

4. i1i2+i3

Subtopic:  Kirchoff's Current Law |
 85%
From NCERT
PMT - 1998
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A resistance of 4 Ω and a wire of length 5 metres and resistance 5 Ω are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1 Ω. A parallel combination of two identical cells is balanced across 300 cm of the wire. The e.m.f. E of each cell is:

1. 1.5 V

2. 3.0 V

3. 0.67 V

4. 1.33 V

Subtopic:  Meter Bridge & Potentiometer |
 68%
From NCERT
PMT - 1997
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